To find the solution we will first find the difference between each number and mean, and then substitute the value in the formula of standard deviation.
The standard deviation is 8.4477 and the variance is 71.40.
Given to us
- Test scores of Adimas = (76, 87, 65, 88, 67, 84, 77, 82, 91, 85, 90)
- Mean = 81
<h3>Standard Deviation</h3>
difference between each number and mean,


= 25 + 36 + 256 + 49 + 196 + 9 + 16 + 1 + 100 +16 + 81
= 785


<h3>Variance</h3>
Variance = 
= 71.40
Hence, the standard deviation is 8.4477 and the variance is 71.40.
Learn more about Standard Deviation:
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12.6$Answer:
Step-by-step explanation:
1$ - 20$ = 19$ / 3 = 6.3$
6.3$ x 2 = 12.6$
Answer:
15,16,17
Step-by-step explanation:
Consecutive intigers: numbers that go in order (eg. 1,2,3....45,46,47)
x+x+1+x+2=48
3x+3=48
3x=45
x=15
15,16,17
3.6 x 4 = 14.4, so 14.4 would be the answer.
The highest degree of any term is 8, so that is the degree of the polynomial.